<SEC-DOCUMENT>0001209191-21-032156.txt : 20210512
<SEC-HEADER>0001209191-21-032156.hdr.sgml : 20210512
<ACCEPTANCE-DATETIME>20210512174053
ACCESSION NUMBER:		0001209191-21-032156
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20210511
FILED AS OF DATE:		20210512
DATE AS OF CHANGE:		20210512

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			MERESMAN STANLEY J
		CENTRAL INDEX KEY:			0001283102

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-39039
		FILM NUMBER:		21916409

	MAIL ADDRESS:	
		STREET 1:		2071 HUNTINGTON LANE
		CITY:			LOS ALTOS
		STATE:			CA
		ZIP:			94024

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			Cloudflare, Inc.
		CENTRAL INDEX KEY:			0001477333
		STANDARD INDUSTRIAL CLASSIFICATION:	SERVICES-PREPACKAGED SOFTWARE [7372]
		IRS NUMBER:				270805829
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		101 TOWNSEND ST.
		CITY:			SAN FRANCISCO
		STATE:			CA
		ZIP:			94107
		BUSINESS PHONE:		888.993.5273

	MAIL ADDRESS:	
		STREET 1:		101 TOWNSEND ST.
		CITY:			SAN FRANCISCO
		STATE:			CA
		ZIP:			94107

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	CloudFlare, Inc.
		DATE OF NAME CHANGE:	20091120
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>doc4.xml
<DESCRIPTION>FORM 4 SUBMISSION
<TEXT>
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        <issuerName>Cloudflare, Inc.</issuerName>
        <issuerTradingSymbol>NET</issuerTradingSymbol>
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            <rptOwnerState>CA</rptOwnerState>
            <rptOwnerZipCode>94107</rptOwnerZipCode>
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    <derivativeTable>
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            <securityTitle>
                <value>Stock Option (right to buy)</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <value>8.56</value>
            </conversionOrExercisePrice>
            <transactionDate>
                <value>2021-05-11</value>
            </transactionDate>
            <deemedExecutionDate></deemedExecutionDate>
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            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
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                <transactionPricePerShare>
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                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
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            <expirationDate>
                <value>2028-12-12</value>
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                <transactionPricePerShare>
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                <footnoteId id="F1"/>
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                <value></value>
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                    <value>D</value>
                </transactionAcquiredDisposedCode>
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                <footnoteId id="F1"/>
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                <footnoteId id="F1"/>
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    <footnotes>
        <footnote id="F1">Each share of Class B Common Stock is convertible at any time into Class A Common Stock on a one-to-one basis at the reporting person's election and has no expiration date.</footnote>
        <footnote id="F2">The sale reported in this Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on August 10, 2020.</footnote>
        <footnote id="F3">The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $65.00 to $65.97, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in footnotes (3) through (7) to this Form 4.</footnote>
        <footnote id="F4">The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $66.08 to $66.98, inclusive.</footnote>
        <footnote id="F5">The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $67.17 to $68.14, inclusive.</footnote>
        <footnote id="F6">The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $68.20 to $69.13, inclusive.</footnote>
        <footnote id="F7">The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $69.20 to $69.22,inclusive.</footnote>
        <footnote id="F8">The option is subject to an early exercise provision and is immediately exercisable. Shares subject to the option vest in 16 equal quarterly installments following December 13, 2018.</footnote>
    </footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>/s/ Lindsey Cochran, by power of attorney</signatureName>
        <signatureDate>2021-05-12</signatureDate>
    </ownerSignature>
</ownershipDocument>
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</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
